diff --git a/spec/google/apis/core/upload_spec.rb b/spec/google/apis/core/upload_spec.rb
index fff3f6e82..99039f8f0 100644
--- a/spec/google/apis/core/upload_spec.rb
+++ b/spec/google/apis/core/upload_spec.rb
@@ -131,7 +131,7 @@ RSpec.describe Google::Apis::Core::RawUploadCommand do
 
   context('with Tempfile input') do
     let(:file) do
-      temp_file = Tempfile.new
+      temp_file = Tempfile.new("tempfile")
       temp_file.write("Hello world\n")
       temp_file.rewind
       temp_file